Fuse for projectiles



1529,00@ E. J. "r,v WENNERSTRM FUSE FOR FROJEQTILES Filed Dec. l0, 1923 2 Sheets-Sheet l Per ,MM-@h w, w25. www@ E. .5. T. WENNERSTRM FUSE FOR PRoJEcTILEs med Dec.. 1o, 192:5

2 Sheets-Sheet 2 Patented Mar. 10, 1925.

ERNST JOHAN TORSTEN WENNERSTRIVI, 0F BOFORS, SWEDEN, ASSIGNOR T0 AKTIE- BOLAGET BOFORS, OF BOFORS, SWEDEN, A LIMITED COMPANY.

FUSE FOR PROJEGTILES.

Application led December 10, 1923.

To all whom t may concern:

Be it known that I, ERNST JOHAN ToRs'rEN WENNERSTRM, subject of the King of Sweden,` residing at Bofors, Sweden, have invented certain new and useful Improvement-s in Fuses for Projectiles, of which the following is a specification.

lThe present invention has for its object improvements in such fuses for projectiles in which the hammer safety device and the primer safety device each forms a separate system, and according to the invention these safety devices are arranged in such a manner that at the firing of the gun the force of inertia in the one system is used for releasing the safety devices of both systems.

In the accompanying drawing the invention is illustrated in some constructional forms.

Fig. 1 is a central longitudinal section of one such constructional form of a fuse, taken on the line II-II (Fig. 2), Fig. 2 is a cross section on the line IIIe-III Fig. 1, Fig. 3 illustrates a central longitudinal section of another constructional form and Figs. 4 and 5 are a central longitudinal sec.- tion on the line VII-VII (Fig. 5) and a cross section on the line VIII-VIII (Fig. 4) of still one other constructional form of the fuse.

In the constructi'onal form illustrated in Figs. 1 and 2 the hammer 1 is locked by means of the sliding bolt 11, the bolt 12 and its surrounding spring 13, which parts form the hammer safety device. The primer safety device in this construction comprises the locking ring 14 and the surrounding spring '3. At the firing of the gun this locking ring is pushed backwards firmly on the detonator (on account yof the force of inertia) and compresses the spring 5 until the acceleration of the projectile ceases, at which time the detonator 4 and the locking ring 111, lirmly retained on the same, are again pushed forward by the spring 5. At this forward movement the detonator 4 pushes the locking bolt 12 forward, whereby the sliding bolt 11 is permitted to be moved outwards under the action'of the centrifugal force, thus releasing the hammer 1.

The constructional form illustrated in Fig. 3 essentially corresponds to that now described, but the fuse is provided also with Serial No. 679,662.

a movable needle holder 17 which also may be locked by means of the sliding bolt 11, already described.

In the constructiona-l form illustrated in Figs. 4f and 5 the shape of the sliding bolt 16, corresponding to the bolt 11 before de` scribed, is such that the said bolt, after'having been thrown outwards from engagement with the hammer under the action of the centrifugal force, turns itself in` suoli a manner that its inner end cannot again enter in such engagement Having now particularly described the nature of my invention and the manner of its operation, what I claim is:

1. In a projectile fuse in which a primer and a detonator initially occupy a safety position relatively to each other, a safety system, a member embodied in this system and free to move by the Vforce of inertia at the firing of the gun to release the system, a second safety system, a locking member in the latterI system, and a member in the first system which engages the locking member and causes such member to slide and thus release the second system, a hammer and one safety device constituting one of the said systems, and another safety device with the detonator constituting the other system.

2. A projectile fuse comprising a hammer and a safety device including a locking bolt, a detonator, and a safety device including a sliding locking member for engaging and locking said bolt, the said bolt being so formed that after the release thereof by the sliding membersit is rendered incapable of engaging the hammer, and means whereby the sliding member is 'operated by the inertia at the firing of the gun to release the safety devices.

3. A projectile fuse comprising a hammer and a safety device constituting a safety system, a detonator and a safety device constituting a second'safety system, a bolt for locking the hammer, a sliding member for releasing the said bolt and a movable needle-holder also locked by the said bolt.

In testimony whereof I affix my signature in presence of two witnesses.

ERNST JOHAN TORSTEN WENNERSTROIVI.

Witnesses:

G. CARLIN, N. THRING. 

